What is a Fluorescein (C₂₀H₁₂O₅)?

Fluorescein is a synthetic organic compound and fluorescent dye that emits bright green-yellow fluorescence when exposed to light. Its strong fluorescent properties make it useful in various applications, particularly in medical diagnostics and environmental tracing. In medicine, it is commonly used in ophthalmology to detect corneal abrasions or damage. It's also a key component in fluorescein angiography, a diagnostic procedure for visualizing retinal blood vessels. When injected into the bloodstream, fluorescein circulates to the retina, where it highlights the vascular structure under a special camera.

In environmental sciences, it is used as a tracer to study water flow, leakage detection, and pollution tracking. In biological and chemical research, fluorescein can label molecules for tracking interactions and movement at the microscopic level. Fluorescein is generally considered low in toxicity, but allergic reactions or mild side effects may occur in sensitive individuals or at high doses. Its medical use should be supervised by professionals.

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